Have you not seen (the sight) that Allâh sends down water from the clouds and causes it to flow (in the form of) streamlets on the earth and then brings forth herbage of various kinds and of diverse hues with it, then it dries up (after ripening) so that you see it turn yellow; then He turns it into chaff. Behold! in this (similitude) is a reminder for people endowed with pure and clear understanding.